安宁市大气降尘污染时空分布特征及来源分析

Analysis of Spatiotemporal Distribution Characteristics andSources of Atmospheric Dust Pollution in Anning City

根据安宁市近4年(2019年12月~2023年11月)降尘监测数据,分析安宁市降尘污染的分布特征,旨在为安宁市的大气污染防控工作提供参考。结果表明,安宁市近4年的年均降尘量均低于昆明地区参考标准8 t/km2·m,且呈现下降趋势。降尘量最高的季节在春季,除第二年外,其余三年安宁市降尘量季节变化趋势均为春季>夏季>秋季>冬季,且降尘量的季节性差异不显著。安宁市大气降尘污染来源包括道路扬尘、施工工地扬尘以及工业企业废气扬尘等。

Based on the dust monitoring data of Anning City in the past four years(December 2019 to November 2023),this article analyzes the distribution characteristics of dust pollution in Anning City in the past four years,aiming to provide references for air pollution prevention and control work in Anning City.The results show that the average annual dust reduction in Anning City in the past four years is lower than the reference standard of 8 tons/square kilometer·month in Kunming area,and shows downward trend.The season with the highest dust reduction is in spring.Except for the second year,the seasonal variation trend of dust reduction in Anning City for the remaining three years is spring>summer>autumn>winter,and the seasonal difference in dust reduction is not significant.The sources of atmospheric dust pollution in Anning City include road dust,construction site dust,and industrial enterprise exhaust gas dust.